Tolerate that buildToolsVersion is not set in rootProject
Tolerate that buildToolsVersion is not set in rootProject

Do not assume that buildToolsVersion is set on root project, as this is commonly not done
for versions of Android Gradle Plugin > 3.1.4 (which uses a default version for that version of the plugin).
=> Use a safe get, with a fallback.

stefalda/ReactNativeLocalization,stefalda/ReactNativeLocalization,stefalda/ReactNativeLocalization,stefalda/ReactNativeLocalization